package com.neusmart.common.view;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.text.style.DynamicDrawableSpan;
import android.text.style.ImageSpan;

import java.lang.ref.WeakReference;

/**
 * Vertical Image Span
 * <p/>
 * roy
 */
public class VerticalImageSpan extends ImageSpan {


    private WeakReference<Drawable> mDrawableRef;
    private double ratio;

    public VerticalImageSpan(Context context, int resourceId, int verticalAlignment) {
        super(context, resourceId, verticalAlignment);
    }

    public VerticalImageSpan(Context context, int resourceId) {
        super(context, resourceId, DynamicDrawableSpan.ALIGN_BASELINE);
    }

    public VerticalImageSpan(Drawable d) {
        super(d);

    }public VerticalImageSpan(Bitmap b) {
        super(b);
    }

    public int getSize(Paint paint, CharSequence text, int start, int end,
                       Paint.FontMetricsInt fontMetricsInt) {
        Drawable drawable = getDrawable();
        Rect rect = drawable.getBounds();
        if (fontMetricsInt != null) {
            Paint.FontMetricsInt fmPaint = paint.getFontMetricsInt();
            int fontHeight = fmPaint.bottom - fmPaint.top;
            int drHeight = rect.bottom - rect.top;

            int top = drHeight / 2 - fontHeight / 4;
            int bottom = drHeight / 2 + fontHeight / 4;

            fontMetricsInt.ascent = -bottom;
            fontMetricsInt.top = -bottom;
            fontMetricsInt.bottom = top;
            fontMetricsInt.descent = top;
        }
        return rect.right;
    }

    @Override
    public void draw(Canvas canvas, CharSequence text, int start, int end,
                     float x, int top, int y, int bottom, Paint paint) {
        Drawable drawable = getDrawable();
        canvas.save();
        int transY = 0;
        transY = ((bottom - top) - drawable.getBounds().bottom) / 2 + top;
        canvas.translate(x, transY);
        drawable.draw(canvas);
        canvas.restore();
    }
    private Drawable getCachedDrawable(Paint paint) {
        WeakReference<Drawable> wr = mDrawableRef;
        Drawable d = null;
        if (wr != null)
            d = wr.get();
        if (d == null) {
            d = getDrawable();
            d.setBounds(new Rect(0, 0, (int) (paint.getFontMetricsInt(null) * ratio), paint.getFontMetricsInt(null)));
            mDrawableRef = new WeakReference<>(d);
        }
        return d;
    }

    public void setRatio(double ratio) {
        this.ratio = ratio;
    }

}
